WO2011118500A1

WO2011118500A1 - One-way clutch and method for reuse of same

Info

Publication number: WO2011118500A1
Application number: PCT/JP2011/056394
Authority: WO
Inventors: 高田声一; 佐藤ちより
Original assignee: Ntn株式会社
Priority date: 2010-03-26
Filing date: 2011-03-17
Publication date: 2011-09-29
Also published as: JP2011202756A

Abstract

Provided are a one-way clutch which readily allows a set of components excluding a deteriorated outer ring to be reused and a method for reuse of the clutch. The one-way clutch (1) includes an outer ring (4) which has cam surfaces (10) at a plurality of positions in the circumferential direction of the inner circumference surface and is disposed on the outer circumference of a shaft (30). The clutch (1) further includes a plurality of engagers (6) interposed between each of the cam surfaces (10) and the shaft (30), a retainer (8) for retaining these engagers (6), and a spring member (7) which is supported by the retainer (8) to resiliently force the engagers (6) in the circumferential direction toward the cam surface (10). Each of the cam surfaces (10) forms a wedge surface which allows the engagers (6) to engage with the cam surfaces (10), when the outer ring (4) rotates in one direction relative to the shaft (30), to block the relative rotation of the outer ring (4), but which allows the engagers (6) to be disengaged therefrom, when the outer ring (4) rotates in the other direction, to permit the relative rotation. The retainer (8) is combined with a plurality of engagers (6) and a spring member (7) inseparably from each other to form a retainer unit (5), which is then incorporated into the outer ring (4) so as to be insertable and removable in the axial direction.

Description

One-way clutch and its reuse method

Related applications

This application claims the priority of Japanese Patent Application No. 2010-071624 filed on Mar. 26, 2010, which is incorporated herein by reference in its entirety.

The present invention relates to a one-way clutch used for, for example, a drive unit of office equipment and a reuse method thereof, and more particularly, to a technique for reusing the one-way clutch.

This type of one-way clutch generally includes an outer ring having cam surfaces at a plurality of locations in the circumferential direction of the inner peripheral surface, a plurality of engagement elements interposed between the cam surfaces and the shaft, and these engagement elements. And a spring member that biases each engagement element toward the cam surface (for example, Patent Documents 1 and 2). A roller is used for the engagement element.

JP-A-9-89011 JP-A-10-238560

Some one-way clutches that are used by being incorporated in resin parts in office equipment, etc., use heat-treated iron-based sintered metal that is easy to mold as the material of the outer ring that is a component. In such a one-way clutch, the outer ring has lower hardness and lower strength than the roller incorporated inside. For this reason, if the roller or spring member is used for a certain period or more, even if there is no abnormality in the roller or the spring member, the outer ring is deteriorated such as wear, and at that time, all components including the outer ring are discarded. For this reason, it was considered to reuse rollers, spring members, cages, and the like, which are component parts having no abnormality. However, even if it is to be reused, it is not easy to disassemble, and even if it can be disassembled, the rollers and spring members will be separated. For this reason, the work efficiency for reuse is very bad, and the reuse of the component without an abnormality has not been carried out yet.

An object of the present invention is to provide a one-way clutch in which other components can be easily reused when an outer ring is deteriorated, and a reuse method thereof.

The one-way clutch according to the present invention includes an outer ring having cam surfaces at a plurality of locations in the circumferential direction on the inner peripheral surface and disposed on the outer periphery of the shaft, and a plurality of intermediate wheels interposed between the cam surfaces of the outer ring and the shaft. Engaging members, a retainer that holds the plurality of engaging members, and a spring member that is supported by the retainer and applies elastic force to each of the engaging members in the circumferential direction toward the cam surface. Each cam surface engages with the engagement element in one direction relative rotation of the outer ring with respect to the shaft and prevents relative rotation of the outer ring, and engages with the engagement element in the other direction relative rotation. A one-way clutch that constitutes a wedge surface that permits rotation, and the retainer unit is incorporated in the retainer so as not to be separated from each other to form a retainer unit, and the retainer unit is attached to the outer ring. It is assembled so that it can be inserted and removed in the axial direction. That.

According to this configuration, a plurality of engagement elements and spring members are incorporated in the cage in a separable manner to form a cage unit, and this cage unit is incorporated in the outer ring so that it can be inserted and removed in the axial direction. In this case, the cage unit can be easily separated from the outer ring. By incorporating this separated cage unit into a new outer ring, the one-way clutch can be reused. At this time, since the engaging element and the spring member are incorporated in the retainer so as not to be separated from each other, they are not detached even during cleaning and assembly during reuse, so that workability is improved and incorporation is facilitated.

In the present invention, the outer ring may be made of a material whose hardness is lower than that of the engaging member. In this case, wear of the outer ring occurs before wear of the engagement element. By replacing the worn outer ring with a new one, a new one-way clutch can be constructed by reusing the cage unit.

In the present invention, the outer ring may have a flange that receives one end surface of the cage unit at one end thereof. Further, a cage unit pushing window into which the pushing jig can be inserted may be formed on the flange. With the flange, the cage unit can be positioned in the axial direction with respect to the outer ring. Even if the outer ring has a flange, the cage unit can be easily pushed out from the outer ring with a jig by using an extrusion window provided on the flange.

When the outer ring is provided with the flange, the retainer may be formed so as to be able to change the direction of the axial direction to be inserted into and removed from the outer ring. In the case of this configuration, when manufacturing a plurality of types of one-way clutches whose locking directions are opposite to each other, the outer ring is manufactured with two types having different cam surface inclination directions, and the cage unit is inserted into the outer ring. It is possible to cope with a common cage unit by changing the direction of the. Therefore, the parts of the cage unit can be unified regardless of the locking direction, and productivity can be improved by unifying the parts.

In the present invention, a resin torque transmission wheel having at one end a flange that receives at least one end surface of the outer ring is provided by being externally fitted to the outer ring, and a clutch extrusion window into which an extrusion jig can be inserted is provided on the flange. It may be formed. By providing the resin torque transmission wheel, the outer ring can be easily assembled to the one-way clutch using device. Even if there is a resin torque transmission wheel, the one-way clutch can be easily pushed out from the torque transmission wheel with a jig by using the push-out window of the flange of the torque transmission wheel.

In this invention, a resin torque transmission wheel having at one end a flange that receives at least one end surface of the outer ring is provided by being fitted on the outer ring, and the outer surface of the flange is opposed to the outer periphery of the outer ring from the axial direction. A cut portion may be formed. Also in this configuration, by providing the resin torque transmission wheel, the outer ring can be easily assembled to the one-way clutch using device. Even if there is a resin torque transmission wheel, the flange is separated from the cylinder portion of the torque transmission wheel by pushing the one-way clutch relative to the tube portion of the resin torque transmission wheel in the axial direction. The one-way clutch can be easily pulled out from the torque transmission wheel together with the separated flange. In this case, the inner diameter portion of the flange of the resin torque transmission wheel may be fitted to the inner peripheral surface of the outer ring. As described above, when the inner diameter portion of the flange is fitted to the inner peripheral surface of the outer ring, even when a radial load is applied to the flange during operation, the flange can be prevented from being damaged at the cut portion.

In the present invention, a resin torque transmission wheel may be provided in which an inner peripheral portion is fitted into one end of the outer ring and connected to the outer ring. In the case of this configuration, even if the torque transmission wheel has a shape that is long in the axial direction connected to a connected body such as a roller, it can be easily connected to and disconnected from the outer ring.

In this invention, the engagement element is a roller, and the cage is provided with a pair of ring-shaped side plate portions that are separated from each other in the axial direction, and columns provided at a plurality of positions in the circumferential direction across both side plate portions. The space surrounded by the adjacent column part and the side plate parts on both sides is made of resin which becomes a pocket for accommodating each engagement element, and the opening edge on the outer diameter side of the cage of each pocket. A retaining protrusion that protrudes from the pillars on both sides to prevent the engaging element from coming out to the outer diameter side, and the opening width between the retaining protrusions on both sides is larger than the outer diameter of the engaging element. Although narrow, the retaining protrusion may be elastically deformed and inserted into the pocket of the engaging element by pushing the engaging element from the outer diameter side of the cage.

When the retainer protrusion that can be elastically deformed is provided on the cage as described above, the engagement element is incorporated into the cage by pushing the engagement element into each pocket from the outer diameter side of the cage. At this time, the retaining protrusion is elastically deformed by the elasticity of the resin that is the material of the cage and allows the passage of the engagement element into the pocket. It is prevented from engaging and coming out of the protrusion. Therefore, it is easy to incorporate the engaging element into the retainer, and when the retainer unit is taken out from the outer ring for reuse, the engaging element does not come out unexpectedly, and the disassembly and reassembly work for reuse can be performed. Easy to do.

When the retainer protrusion is provided on the cage, one or both of the retainer protrusions provided on both sides of the pocket are in the length direction of the column portion. It is good also as a shape which extended along and the one part of the pillar part length direction protruded gradually larger than the other part. When the retaining protrusion has a shape in which a part of the protrusion is large as described above, the retaining protrusion is easily elastically deformed when the engaging element is pushed in, and can be pushed in without difficulty.

In this invention, the cage unit may be a reuse product that has been used as a one-way clutch, and the outer ring may be new. In this case, it becomes a new one-way clutch in which normal function and quality are ensured while the outer ring is simply replaced with a new one by reusing the cage unit. In this case, a reuse information mark portion indicating the fact or frequency of reuse of the cage unit may be provided in the cage in the cage unit of the reuse product and the outer ring. By providing the reuse information mark portion in this way, it is possible to easily determine whether the cage unit is a reuse product.

The method of reusing a one-way clutch according to the present invention is a one-way clutch having any one of the above-described configurations according to the present invention, wherein the one-way clutch provided with a resin torque transmission wheel fitted on the outer ring is reused. This is a method of reusing a directional clutch, the process of recovering the one-way clutch, the process of extracting the outer ring from the resin torque transmission wheel, the process of pulling out the cage unit from the outer ring, the process of cleaning and drying the cage unit, A process of incorporating the dried cage unit into a new outer ring and a process of incorporating an assembly incorporating the cage unit into the outer ring into a resin torque transmission wheel are included.

According to this method, since the recovered used one-way clutch is separated into the resin torque transmission wheel and other components including the outer ring, it is possible to determine whether or not the outer ring has deteriorated. If the outer ring is not deteriorated, it can be reused as it is. However, if the outer ring is deteriorated, the cage unit is pulled out from the outer ring, washed and dried, and then assembled into a new outer ring. The cage unit is a new one-way clutch so that the cage unit can be easily reused.

The present invention will be more clearly understood from the following description of preferred embodiments with reference to the accompanying drawings. However, the embodiments and drawings are merely for illustration and description, and should not be used to define the scope of the present invention. The scope of the invention is defined by the appended claims. In the accompanying drawings, the same reference numerals in a plurality of drawings indicate the same or corresponding parts.
(A) is a left side view of the one-way clutch according to the first embodiment of the present invention, (B) is a longitudinal sectional view of the same direction clutch, and (C) is a right side view of the same direction clutch. (A) is a left side view of the clutch body in the same direction clutch, (B) is a longitudinal sectional view of the clutch body, and (C) is a right side view of the clutch body. (A) is a left side view of the cage unit in the clutch body, (B) is a front view of the cage unit, and (C) is a right side view of the cage unit. It is assembly explanatory drawing of the clutch main body. (A) is a left side view of the cage, (B) is a front view thereof, and (C) is a right side view thereof. (A) is a front view of a spring member, (B) is a side view of the spring member. (A) is a left side view of the lid member in the cage unit, (B) is a longitudinal sectional view of the lid member, and (C) is a right side view of the lid member. (A) is a left side view of the outer ring, (B) is a longitudinal sectional view of the outer ring, and (C) is a right side view of the outer ring. It is sectional drawing explaining the locked state and idling state of a one-way clutch. (A) is a left side view of a clutch body in a one-way clutch according to a second embodiment of the present invention, (B) is a longitudinal sectional view of the clutch body, and (C) is a right side view of the clutch body. FIG. 11 is an explanatory diagram of the operation of extracting the clutch body from the torque transmission wheel in the same direction clutch. (A) is a left side view of a clutch body in a one-way clutch according to a third embodiment of the present invention, (B) is a longitudinal sectional view of the clutch body, and (C) is a right side view of the clutch body. (A) is a left side view of the same direction clutch, (B) is a longitudinal sectional view of the same direction clutch, and (C) is a right side view of the same direction clutch. (A) is a left side view of a clutch body in a one-way clutch according to a fourth embodiment of the present invention, (B) is a longitudinal sectional view of the clutch body, and (C) is a right side view of the clutch body. (A) is a left side view of the same direction clutch, (B) is a longitudinal sectional view of the same direction clutch, and (C) is a sectional view taken along line XV-XV in (B). (A) is a left side view showing a modified example of the cage, (B) is a front view, (C) is a right side view, (D) is an enlarged view of a portion D in FIG. It is the fragmentary top view which looked at the figure (C) from the E direction. It is a partial expansion perspective view of the modification of the holder.

A first embodiment of the present invention will be described with reference to FIGS. 1 (A) to (C) to FIG. The one-way clutch according to the embodiment of the present invention is used, for example, in a drive unit of office equipment such as a copying machine, a printer, and a facsimile. However, it is not necessarily limited to office equipment. The following description also includes a description of a one-way clutch reuse method. When the one-way clutch is used, the shaft 30 is inserted into the fitting hole of the one-way clutch, as shown in FIG.

As shown in FIGS. 1A to 1C, the one-way clutch 1 is composed of a clutch body 2 and a resin torque transmission wheel 3. The clutch body 2 is composed of an outer ring 4 and a plurality of engagement elements. A certain roller 6, a spring member 7, a cage 8, and a lid member 9 are provided. As shown in FIG. 8C, the outer ring 4 has cam surfaces 10 at a plurality of locations in the circumferential direction of the inner peripheral surface, and is arranged on the outer periphery of the shaft 30 as shown in FIG. Each of the cam surfaces 10 forms a wedge surface that forms a predetermined wedge angle δ with the shaft 30, and forms a wedge-shaped space between each of the wedge surfaces and the shaft 30. Each roller 6 is interposed in a plurality of pockets Pt in the circumferential direction provided in the cage 8 together with the individual spring pieces 7 a of the spring member 7. Each pocket Pt is located in each wedge-shaped space between each cam surface 10 of the outer ring 4 and the shaft 30. Each roller 6 is urged in the narrow direction of the wedge-shaped space of the pocket Pt by the spring force of the spring piece 7a. The cage 8 holds a plurality of rollers 6.

As shown in FIG. 9, in the one-way clutch 1, the rollers 6 are engaged with each other in the relative rotation in one direction of the outer ring 4 with respect to the shaft 30 (direction of arrow A <b> 1 in FIG. 9) on each cam surface 10. Prevent relative rotation. That is, the roller 6 moves in the wedge-shaped space narrow direction of the pocket Pt to be in an engaged state, thereby preventing relative rotation of the outer ring 4 with respect to the shaft 30, thereby transmitting torque to the outer ring 4. In the relative rotation in the other direction (the direction of arrow A2 in FIG. 9), the roller 6 is disengaged and the relative rotation of the outer ring 4 is allowed. In other words, the roller 6 moves against the spring force of the spring piece 7 a in the wedge-shaped space widening direction of the pocket Pt to be in a disengaged state, and allows the outer ring 4 to rotate relative to the shaft 30. Thereby, the torque transmission to the outer ring 4 is interrupted.

The hardness of the outer ring 4 is set to be lower than the hardness of the roller 6 that is an engagement element. For example, iron-based sintered metal is used for the material of the outer ring 4. For lubrication, oil-impregnated iron-based sintered metal may be used as the material of the outer ring 4, but it may be lubricated with grease. As shown in FIGS. 8A to 8C, a radially inward flange 11 is provided at one end of the outer ring 4, and the inner periphery of the flange 11 serves as an insertion hole for the shaft 30. On the inner peripheral surface of the flange 11, a plurality of cutout portions 11 a serving as windows for pushing out a cage unit 5 (described later) from the outer ring 4 in the axial direction with a jig are provided with equal distribution in the circumferential direction. Yes. In addition to the cam surface 10, the outer ring 4 is positioned between two

cam surfaces

10 and 10 adjacent to each other in the circumferential direction, and is fitted to the outer peripheral surface of the cage 8 to surround the cage 8. A plurality of positioning grooves 12 that are positioned so as not to be displaceable in the direction are provided in the circumferential direction. These positioning grooves 12 have a circular arc cross section and are formed to extend in the axial direction. A plurality of positioning grooves 13 are provided on the outer peripheral surface of the outer ring 4 so as to be fitted in the inner peripheral surface of the torque transmitting wheel 3 and positioned so as not to be displaceable in the circumferential direction. These positioning grooves 13 are also arc-shaped in cross section and are formed extending in the axial direction.

As shown in FIGS. 5A to 5C, the cage 8 includes a ring-shaped side plate portion 14 having an inner diameter hole attached to the outer periphery of the shaft 30 (FIG. 9) via a radial gap, The column part 15 is formed. The plurality of column portions 15 are integrally fixed to one side of the side plate portion 14, and each column portion 15 extends in an axial direction from one side of the side plate portion 14. The plurality of pillar portions 15 are arranged at predetermined intervals in the circumferential direction, and the pocket Pt is constituted by a space surrounded by the adjacent pillar portions 15 and the side plate portions 14. A plurality of spring piece accommodation spaces 16 are provided corresponding to the pockets Pt, penetrating in the axial direction from the side plate portions 14 to one side portions of the column portions 15 and accommodating the spring pieces 7a of the spring member 7. These spring piece accommodation spaces 16 are located on the wedge-shaped space widening side of each pocket Pt. The outer peripheral surface of the cage 8 has a cross-sectional shape that fits into the inner peripheral surface of the outer ring 4. That is, on the outer peripheral surface of the cage 8, a plurality of ridges 17 that are fitted in the positioning grooves 12 on the inner peripheral surface of the outer ring 4 are provided equally in the circumferential direction. Further, a caulking protrusion 18 is provided at the tip of each column portion 15 so as to extend in the axial direction.

As shown in FIGS. 6A and 6B, the spring member 7 is a leaf spring having an annular portion 7b formed of a single metal plate and a plurality of spring pieces 7a. The annular portion 7b has an inner diameter hole that is attached to the outer periphery of the shaft 30 (FIG. 9) via a radial clearance. A plurality of spring pieces 7a are formed by cutting and raising the outer peripheral edge of the annular portion 7b at regular intervals in the circumferential direction. The base end portion of each spring piece 7a rises by bending at a substantially right angle from the surface forming the annular portion 7b, and the distal end portion of each spring piece 7a becomes a free end portion. An intermediate portion between the base end portion and the tip end portion is bent into a “V” shape.

As shown in FIG. 7A, the lid member 9 is a ring-shaped plate member having an inner diameter hole attached to the outer periphery of the shaft 30 (FIG. 9) via a radial gap, and the outer peripheral surface is the outer ring 4. It is set as the shape fitted to the inner peripheral surface. That is, on the outer peripheral surface of the lid member 9, a plurality of protrusions 19 that fit into the positioning grooves 12 (FIG. 8C) on the inner peripheral surface of the outer ring 4 are provided in the circumferential direction. . Further, the lid member 9 is provided with caulking holes 9a with which the caulking protrusions 18 of the retainer 8 are engaged at a plurality of locations in the circumferential direction, and the caulking protrusions 9a are engaged with the caulking protrusions 9a. The lid member 9 is fixed to the end portion side from which the column portion 15 of the retainer 8 protrudes by engaging the portion 18 and caulking.

As shown in FIG. 4, the spring member 7 is incorporated in the cage 8 by inserting each spring piece 7 a from the side plate portion 14 side of the cage 8 into each spring piece accommodating space 16 in the axial direction. In this assembled state, the annular portion 7 b of the spring member 7 contacts the side plate portion 14 of the cage 8. The roller 6 is incorporated into the cage 8 by being inserted into the pocket Pt in the axial direction from the side from which the column portion 15 of the cage 8 protrudes. The space surrounded by the

adjacent column portions

15 and 15 is shaped such that the rollers 6 do not fall off to the inner diameter side and the outer diameter side. After the roller 6 is assembled, the caulking hole 9a of the lid member 9 is engaged with the caulking protrusion 18 at the tip of each column part 15 of the cage 8, and the caulking protrusion 18 is caulked. The lid member 9 is fixed to the end portion of the cage 8 on the protruding side of the column portion 15. Thereby, it is possible to prevent the rollers 6 from coming out of the cage 8 in the axial direction. In this manner, the cage member 5 shown in FIGS. 3A to 3C is configured by incorporating the spring member 7 and the plurality of rollers 6 into the cage 8 so as not to be separated from each other.

The retainer unit 5 is inserted axially into the outer ring 4 as shown in FIG. 4 from one end where the annular portion 7b of the spring member 7 is located, and is fitted to the inner peripheral surface of the outer ring 4, so that the outer ring The end face of the cage unit 5 is received by the flange 11 of 4. Thus, the outer ring 4 and the cage unit 5 constitute the clutch body 2 shown in FIGS. Note that the clutch body 2 alone may be handled as a finished product of the one-way clutch 1. The cage unit 5 can be inserted even if the axial direction is reversed with respect to the outer ring 4.

As shown in FIGS. 1 (A) to 1 (C), the resin torque transmitting wheel 3 is a member that is engaged with the outer ring 4 and is connected to the outer ring 4 so as to rotate relative to the outer ring 4. It also functions as a casing that fits the surface and covers the entire outer ring 4. One end of the torque transmission wheel 3 is provided with a radially inward flange 20. The clutch body 2 is inserted and fitted into the torque transmission wheel 3 from the open end side where the flange 20 of the torque transmission wheel 3 is not provided, with the end side where the lid member 9 is located at the head. On the inner peripheral surface of the torque transmission wheel 3, a plurality of protrusions 21 that are fitted in the positioning grooves 13 on the outer peripheral surface of the outer ring 4 are provided in the circumferential direction. Thereby, the clutch main body 2 is incorporated in the inner peripheral surface of the torque transmission wheel 3 so as to be insertable / removable, and cannot be displaced in the circumferential direction. In this assembled state, one end surface of the outer ring 4 and the lid member 9 in the clutch body 2 are received by the flange 20 of the torque transmission wheel 3. The inner periphery of the flange 20 of the torque transmission wheel 3 is an inner diameter hole that is attached to the outer periphery of the shaft 30 (FIG. 9) via a radial gap, and the clutch body 2 is attached to the periphery of the inner diameter hole with a jig. A plurality of notches 20a for pushing out from the torque transmission wheel 3 in the axial direction are provided as clutch pushing windows.

A method for reusing the one-way clutch 1 will be described.
A new one-way clutch 1 is incorporated in the device, and after the device has been operated for a predetermined period, for example, the used product of the clutch body 2 detached from the shaft 30 and the resin torque transmission wheel 3 is collected. At this time, by using the notch portion 20a of the flange 20 of the torque transmission wheel 3 as a clutch push-out window, the clutch body 2 can be easily pushed out from the torque transmission wheel 3 in the axial direction using a jig. . When the clutch main body 2 is detached from the torque transmission wheel 3, the outer ring 4 is exposed, so that it is possible to determine durability deterioration such as wear of the outer ring 4. As described above, since the material of the outer ring 4 is set to be lower in hardness than the rollers 6 that serve as the engagement elements, the retainer unit 5 can be reused in most cases even if the outer ring 4 is deteriorated in durability. .

Further, the cage unit 5 is pulled out from the outer ring 4 of the recovered clutch body 2. At this time, by using the notch 11a of the flange 11 of the outer ring 4 as a push-out window for the cage unit 5, the cage unit 5 can be easily pushed out from the outer ring 4 in the axial direction using a jig. it can.

Next, cleaning, degreasing, and drying are performed without disassembling the cage unit 5 for each component. Next, the cage unit 5, which is a reused product that has been washed and dried, is incorporated into the new outer ring 4. At this time, a reuse information mark portion 40 indicating the fact or number of reuse of the cage unit 5 is applied to, for example, the outer peripheral surface of the cage unit 5 that is a reused product and the new outer ring 4. The mark part 40 consists of a character, a symbol, a colored part, etc., for example, is given to uneven | corrugated shape using a stamp, a pencil grinder, etc. The mark unit 40 may be configured to determine the fact or number of reuse by comparing with contrast information (not shown) such as a contrast table provided separately.

Next, the clutch body 2 in which the reusable cage unit 5 is incorporated in the outer ring 4 in this way is incorporated in the resin torque transmission wheel 3, and the one-way clutch 1 is regenerated. The recycled product of the one-way clutch 1 is inspected and shipped. As a shipment inspection of the regenerated one-way clutch 1, the one-way clutch 1 is incorporated into the shaft 30, and it is confirmed whether or not the relative rotation of the outer ring 4 is prevented (locked) by one-way relative rotation of the outer ring 4 with respect to the shaft 30. To do. Further, whether or not rotation is allowed (idling) by the relative rotation of the outer ring 4 in the other direction with respect to the shaft 30 and the idling torque level are confirmed. After the lock and idling confirmation is performed in this way, the one-way clutch 1 is shipped to a user or the like.

According to the one-way clutch 1 described above, a plurality of rollers 6 and spring members 7 serving as the engagement elements 6 are incorporated in the cage 8 so as not to be separated from each other to form a cage unit 5, and the cage unit 5 is attached to the outer ring 4. Since the clutch body 2 is assembled so that it can be inserted and removed in the direction, when the outer ring 4 is deteriorated, the cage unit 5 is extracted from the outer ring 4 and incorporated into the new outer ring 4 so that the one-way clutch 1 can be reused. It becomes possible. At this time, since the rollers 6 and the spring members 7 that are the engagement elements are incorporated in the cage 8 so as not to be separated from each other, they are not detached even in cleaning and assembly during reuse, and workability is improved and incorporation is easy. It becomes.

In this embodiment, since the hardness of the material of the outer ring 4 is set lower than that of the roller 6, the outer ring 4 is worn before the roller 6 is worn. For this reason, if the used product of the one-way clutch 1 is collected and the outer ring 4 is not worn, it can be determined that the used product of the one-way clutch 1 is not worn. Therefore, without confirming the wear state or the like of each component of the cage unit 5, in other words, disassembling each one-way clutch component and confirming the wear or the like without checking the wear state of these components It can be determined that the one-way clutch 1 can be reused at least when the clutch body 2 is incorporated.

In this embodiment, the wedge angle δ of the cam surface 10 of the outer ring 4 is reverse, that is, for the outer ring 4 in which the required locking direction is reverse, the direction of insertion of the cage unit 5 into the outer ring 4 is changed. By making it reverse, the spring piece 7a of the spring member 7 can be arranged to urge the roller 6 toward the wedge-shaped space narrow side of the pocket Pt. Therefore, the cage unit 5 can be shared without being influenced by the locking direction.

FIGS. 10A to 10C and FIGS. 11A and 11B show a second embodiment of the present invention. In the one-way clutch 1 of this embodiment, as shown in FIG. 10B in the first embodiment shown in FIGS. 1A to 1C, the axial length of the cylindrical portion of the outer ring 4 is shown. Is longer than the axial length of the cage unit 5, and the cage unit 5 is incorporated in the outer ring 4, one end of the outer ring 4 without the flange 11 and the cage unit 5. A recess G1 surrounded by the end is formed. Further, as shown in FIG. 11A, the resin torque transmitting wheel 3 includes a cylindrical portion 3a fitted on the outer ring 4, and an end portion corresponding to the flange-unformed end portion of the outer ring 4 in the cylindrical portion 3a. And a radially inward flange portion 3b. The flange portion 3b is an inner peripheral fitting portion 3ba that has an inner diameter side extending in the axial direction and is fitted to the inner peripheral surface of the outer ring 4. Further, on the surface on the outer side in the axial direction of the flange portion 3b, a notch portion 22 having a V-shaped cross section extending in a ring shape is formed at a position facing the outer periphery of the outer ring 4 from the axial direction.
The notch 22 has a cylindrical surface 22a having the same diameter as or slightly larger than the outer peripheral surface of the outer ring 4, and a portion that is provided radially inside the cylindrical surface 22a and gradually increases in diameter toward the inner side in the axial direction. It is formed by the conical surface 22b. Other configurations are the same as in the case of the first embodiment shown in FIGS. 1 (A) to (C) to FIG.

In the case of this embodiment, when the clutch body 2 is pulled out from the torque transmission wheel 3, the outer ring 4 is flanged with the cylindrical portion 3a of the torque transmission wheel 3 held by the jig 31, as shown in FIG. The flange portion 3b of the torque transmitting wheel 3 is separated from the cylindrical portion 3a at the cut portion 22 by being pushed by another jig (not shown) as indicated by an arrow A from the end portion side having 11. The clutch body 2 can be pulled out from the torque transmission wheel 3 together with the flange portion 3b. Further, by using the notch portion 11a of the inner peripheral surface of the flange 11 in the outer ring 4 as a push-out window for the cage unit 5, the cage unit 5 can be moved together with the flange portion 3b from the inside of the outer ring 4 using a jig. It can be easily extruded in the axial direction.

When the one-way clutch 1 is operated, the flange portion 3b of the resin torque transmitting wheel 3 has a radial fitting generated on the flange portion 3b because the inner circumferential fitting portion 3ba is fitted to the inner circumferential surface of the outer ring 4. The load is not applied to the cut portion 22, and the flange portion 3 b can be prevented from being damaged from the cut portion 22 during operation.

FIGS. 12A to 12C and FIGS. 13A to 13C show a third embodiment of the present invention. In the one-way clutch 1 of this embodiment, in the first embodiment shown in FIGS. 1A to 1C, the flange 11 of the outer ring 4 is provided as shown in FIGS. A connecting recess G <b> 2 is formed inside the outer ring 4 and surrounded by the end of the outer ring 4 and the flange 11. The inner peripheral surface of the end of the outer ring 4 that forms the connecting recess G2 is formed in, for example, a pentagon that is non-circular as shown in FIG. Further, as shown in FIG. 13B, the resin torque transmission wheel 3 has a shape that is long in the axial direction to be connected to a transmission body such as a roller, and has a connecting recess for the outer ring 4 at one end thereof. A pentagonal columnar connecting portion 23 is formed to be fitted to G2. By fitting the connecting portion 23 of the torque transmitting wheel 3 into the connecting recess G2 of the outer ring 4, the outer ring 4 and the torque transmitting wheel 3 are integrally connected. Thereby, the clutch body 2 can be easily detached from the resin torque transmission wheel 3. Other configurations and operational effects are the same as those of the first embodiment shown in FIGS. 1 (A) to (C) to FIG.

FIGS. 14A to 14C and FIGS. 15A to 15C show a fourth embodiment of the present invention. In the one-way clutch 1 of this embodiment as well, in the first embodiment shown in FIGS. 1 (A) to (C) to FIG. 9, as shown in FIGS. In the state where the axial length of the surface is longer than the axial length of the cage unit 5 and the cage unit 5 is incorporated in the outer ring 4, And a concavity G3 for connection surrounded by the ends of the cage unit 5 are formed. Apart from this, a notch-like recess 4 a is provided in a part of the outer ring 4 in the circumferential direction of the one end. Also in this case, the resin torque transmitting wheel 3 has a shape that is long in the axial direction connected to a body to be transmitted such as a roller, and as shown in FIGS. A connecting portion 24 that fits into the four connecting recesses G3 is formed. In this case, the connecting portion 24 is partially fitted in the inner peripheral surface of the end portion of the outer ring 4 as shown in FIG. 15C showing a cross-sectional view taken along the line XV-XV in FIG. The inner circumferential fitting portion 24a is the other circumferential portion, and the engaging portion 24b is engaged with the notched recess 4a at the end of the outer ring 4. Also in this case, the outer ring 4 and the resin torque transmitting wheel 3 are integrally connected by fitting the connecting portion 24 of the resin torque transmitting wheel 3 into the connecting recess G3 of the outer ring 4. Thereby, the clutch body 2 can be easily detached from the resin torque transmission wheel 3. Other configurations and operational effects are the same as those of the first embodiment shown in FIGS. 1 (A) to (C) to FIG.

16 (A) to 16 (E) and FIG. 17 show modifications of the cage. In other words, the retainer 8A is formed by integrating the retainer 8 and the lid member 9 in each of the above embodiments so that the roller 6 (FIG. 1B) as an engaging member is assembled so as not to come out of the outer diameter surface. It is a thing. Other than the matters to be specifically described, the cage 8 is the same as the cage 8 of the above embodiment.

The cage 8A is composed of a pair of ring-shaped

side plate portions

14A and 14B that are separated from each other in the axial direction, and column portions 15A that are provided at a plurality of locations in the circumferential direction across both

side plate portions

14A and 14B. The whole is integrally molded and is made of resin. A space surrounded by the

adjacent column portions

15A and 15A and the

side plate portions

14A and 14B on both sides is a pocket Pt that accommodates each roller 6 (FIG. 1B). A spring piece accommodation space 16 extending in the axial direction is provided extending from one side plate portion 14A to one side portion of each column portion 15A so as to open to each pocket Pt. The spring piece accommodating space 16 penetrates the one side plate portion 14A, but does not penetrate the other side plate portion 14B. The spring piece accommodating space 16 is a space for accommodating each spring piece 7a of the spring member 7 described above with reference to FIG. 4, and these spring piece accommodating spaces 16 are located on the wedge-shaped space widening side of each pocket Pt. The outer peripheral surface of the cage 8 has a cross-sectional shape that fits into the inner peripheral surface of the outer ring 4 (FIGS. 8A to 8C). That is, on the outer peripheral surface of the cage 8, a plurality of ridges 17 that are fitted in the positioning grooves 12 on the inner peripheral surface of the outer ring 4 are provided equally in the circumferential direction.

16 (A) to 16 (E) and FIG. 17, the opening edge of each pocket Pt on the outer diameter side of the cage protrudes from the pillar portions 15A on both sides to prevent the engaging element from coming out to the outer diameter side 6. The retaining

protrusions

28 and 29 are provided. These retaining

protrusions

28 and 29 extend in the length direction over the entire length of the column portion 15A, but may be provided only in a part of the column portion length direction. The opening width between the

column portions

15A and 15A on both sides, that is, the width between the retaining

projections

28 and 29 is narrower than the outer diameter of the roller 6, but the retaining

projections

28 and 29 are provided on the retainer 8A. By pressing the roller 6 from the outer diameter side, the roller 6 is elastically deformed and can be inserted into the pocket Pt of the roller 6. Note that the retaining

protrusions

28 and 29 on both sides are not necessarily made elastically deformable, and any one of the retaining

protrusions

28 and 29 only needs to be elastically deformable.

In this modified example, the central portion 28a in the length direction of the column portion gradually protrudes from both side portions so that elastic deformation is likely to occur in one of the retaining protrusions 28, and only the central portion 28a is localized. The retaining projection 28 is formed in a two-stage projecting shape projecting to the top. The retainer 8A is used in place of the retainer 8 and the cover plate member 9 in the one-way clutch 1 of each of the above embodiments, and constitutes the retainer unit 5.

When the

retainer protrusions

28 and 29 that can be elastically deformed are provided in the cage 8A in this way, the rollers 6 are inserted into the cage 8A from the outer diameter side of the cage 8A into the pockets Pt. By doing. At this time, the retaining

projections

28 and 29 are elastically deformed by the elasticity of the resin that is the material of the cage 8A, and the retaining projection 28 in which the protruding amount of the central portion 28a is increased. It is elastically deformed and allows the roller 6 to pass into the pocket Pt. However, when assembled, the rollers 6 are prevented from engaging with the retaining

protrusions

28 and 29 and coming out. Therefore, it is easy to incorporate the roller 6 into the cage 8A. Also, when the cage unit 5 is taken out from the outer ring 4 for reuse, the roller 6 does not come out unexpectedly, and can be disassembled and reused for reuse. Reassembly work can be done easily.

In each of the above-described embodiments, the spring member 7 can be replaced with various forms. Instead of the spring member 7 made of a metal plate, a spring member made of a coil spring can be applied. In addition to the rollers 6, balls or the like may be used as the engaging elements. The torque transmission wheel 3 may be a pulley or a gear. In addition, the one-way clutch can be reused in all the embodiments described above.

As described above, the preferred embodiments have been described with reference to the drawings. However, those skilled in the art will readily assume various changes and modifications within the obvious scope by looking at the present specification. Accordingly, such changes and modifications are to be construed as within the scope of the invention as defined by the appended claims.

DESCRIPTION OF SYMBOLS 1 ... One-way clutch 2 ... Clutch main body 3 ... Resin torque transmission wheel 3b ... Flange part 3ba ... Inner circumference fitting part 4 ... Outer ring 5 ... Cage unit 6 ... Roller (engagement element)
7 ... Spring member 8 ... Cage 8A ... Cage 9 ... Lid member 10 ... Cam surface 11 ... Flange 11a ... Notch (Cage unit push-out window)
20 ... Flange 20a of torque transmission wheel ... Notch (clutch pushing window)
22 ...

notches

23 and 24 ... connecting

parts

28 and 29 ... retaining protrusion 40 ... mark part Pt ... pocket

Claims

An outer ring having cam surfaces at a plurality of locations in the circumferential direction of the inner peripheral surface and disposed on the outer periphery of the shaft, a plurality of engagement elements interposed between the cam surfaces of the outer ring and the shaft, A retainer that holds the engagement element, and a spring member that is supported by the retainer and applies elastic force to the engagement element in the circumferential direction toward the cam surface. In the relative rotation in one direction of the outer ring with respect to the shaft, the engagement element engages to prevent the relative rotation of the outer ring, and in the relative rotation in the other direction, the engagement element becomes disengaged and allows rotation. A one-way clutch comprising:
A one-way clutch formed by incorporating the plurality of engaging elements and spring members into the retainer so as not to be separated from each other to form a retainer unit, and incorporating the retainer unit into the outer ring so as to be detachable in the axial direction.
2. The one-way clutch according to claim 1, wherein the outer ring is made of a material whose hardness is lower than that of the engaging member.
2. The one-way clutch according to claim 1, wherein the outer ring has a flange that receives one end surface of the cage unit at one end thereof.
4. The one-way clutch according to claim 3, wherein a cage unit extrusion window into which an extrusion jig can be inserted is formed on the flange.
3. The one-way clutch according to claim 2, wherein the retainer is formed to be capable of changing an axial direction to be inserted into and removed from the outer ring.
2. A clutch extrusion window according to claim 1, wherein a resin torque transmission wheel having a flange that receives at least one end surface of the outer ring at one end is externally fitted to the outer ring, and an extrusion jig can be inserted into the flange. Formed one-way clutch.
A resin torque transmission wheel having a flange at one end for receiving at least one end surface of the outer ring is provided by being externally fitted to the outer ring, and the outer periphery of the outer ring is axially formed on an outer surface of the outer ring. A one-way clutch with opposing notches.
8. The one-way clutch according to claim 7, wherein an inner diameter portion of the flange is fitted to an inner peripheral surface of the outer ring.
The one-way clutch according to claim 1, wherein a resin torque transmitting wheel having a connecting portion that is fitted into one end portion of the outer ring and connected to the outer ring is provided.
In Claim 1, the said engaging element is a roller, The said holder | retainer was provided in several places of the circumferential direction across a pair of ring-shaped side-plate part which mutually separated in the axial direction, and both side-plate parts. The space surrounded by the adjacent column portions and the side plate portions on both sides is made of a resin serving as a pocket that accommodates each engagement element, and the opening edge of each pocket on the outer diameter side of the cage Are provided with retaining protrusions that protrude from the pillars on both sides and prevent the engaging elements from coming out to the outer diameter side, and the opening width between the retaining protrusions on both sides is larger than the outer diameter of the engaging elements. Although it is narrow, the one-way clutch in which the retaining protrusion is elastically deformed and can be inserted into the pocket of the engaging element by pushing the engaging element from the outer diameter side of the cage.
11. The retaining protrusions provided on both sides of the pocket according to claim 10, wherein one or both retaining protrusions extend along a length direction of the column part, and are centered in the column part length direction. A one-way clutch having a shape in which a portion gradually protrudes from both sides.
The one-way clutch according to claim 1, wherein the cage unit is a reuse product that has been used as a one-way clutch, and the outer ring is a new one.
13. The one-way clutch according to claim 12, wherein a mark portion of reuse information indicating a fact or number of reuse of the cage unit is provided on the cage in the cage unit of the reuse product and the outer ring.
A method of reusing a one-way clutch according to claim 1, wherein the one-way clutch is a one-way clutch that is provided with a resin torque transmission wheel that is externally fitted to the outer ring.
The process of collecting the one-way clutch, the process of extracting the outer ring from the resin torque transmission wheel, the process of pulling out the cage unit from the outer ring, the process of cleaning and drying the cage unit, and using this cleaned and dried cage unit as a new outer ring And a method of reusing a one-way clutch including a process of incorporating an assembly in which a cage unit is incorporated into the outer ring into a resin torque transmission wheel.